EFFECTIVENESS OF IMPROVISED STYRO-CUTTER Polystyrene (PS) is a synthetic aromatic polymer made from the monomer styrene‚ a liquid petrochemical. (Retrieved: April 12‚ 2013 http://en.wikipedia.org/wiki/Polystyrene) Expanded polystyrene beads makes up a Styrofoam. Styrofoam is used almost everywhere: it is used as housings of appliances such as televisions‚ computers and refrigerators. It is also utilized as drinking cup especially for hot beverages because of its insulating properties. As a student
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Molecules | Points Earned: | 1/1 | Correct Answer: | D | Your Response: | D | 5. | Cellulose and starch are composed of the same monomers but have structural and functional differences. Which of the following is the characteristic that accounts for those differences? | | A. | Different types of glycosidic linkages | B. | Different numbers of glucose monomers | C. | Different types of bonds holding them together | D. | A linear shape in one versus a ring shape in the other | E. | None
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Materials in Our Daily Life : 95 : 21 Materials in Our Daily Life The basic aim of science is not only to study and understand natural phenomena but also to use this knowledge to make our lives more comfortable. Science and technology have enabled us to develop more economical and convenient methods to recover useful materials from nature and to put them to various uses. Chemistry has enabled us to synthesize new materials which have desired properties‚ thus‚ making them even better than natural
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actually the MreB protein that facilitates cell shape[citation needed].[3][4] Peptidoglycan is also involved in binary fission during bacterial cell reproduction. The peptidoglycan monomers are synthesized in the cytosol and are then attached to a membrane carrier bactoprenol. Bactoprenol transports peptidoglycan monomers across the cell membrane where they are inserted into the existing peptidoglycan.[11] In the first step of peptidoglycan synthesis‚ the glutamine‚ which is an amino acid‚ donates
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structure and reactivity. The altering of shape causes substrates to not bind in the active site (Scott Freeman‚ Micheal Harrington‚ Joan. C Sharp‚ 2009). Amylase is used as a catalytic enzyme to determine the time period to convert starch into glucose monomers and transport into the bloodstream at different ph levels. Methods involved are obtaining six test tubes (different ph levels) with mixture of dilute starch solution and amylase. Starch indicator solution is used to determine if the starch have been
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Mechanism for Olefin Polymerization Chain Propagation: Cossee-Arlman Mechanism = good basic mechanism. Cossee et al.‚ J. Catal.‚ 1964‚ 3‚ 80 & 99. 1‚2-insertion alkene coordination R [M] R [M] [M] R CH2 C H2 [M] R Green-Rooney Mechanism involving metathesis-like step = totally wrong ! CHP CH2P [M] α-elimination [M] H CHP [M] H PHC H [M] R reductive elimination PH2C [M] R alkene coordination R metathesislike process This Mechanism DOES NOT Occur Proposed by Green‚ Rooney
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further treated with dilute acid solution to form ethylene glycol. Ethene can also react with oxygen‚ with a copper chloride catalyst and at 150oC‚ to form vinyl chloride (chloro-ethene) Identify that ethylene serves as a monomer from which polymers are made Ethylene is the monomer which is converted into the polymer polyethylene by the process of polymerisation (chemical reaction where many small identical molecules join together to form one large molecule). Identify data‚ plan and perform a first-hand
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Scientist with Their Contribution Dr Adam Rutherford tells the extraordinary story of the scientific quest to discover the secrets of the cell and of life itself. Every living thing is made of cells‚ microscopic building blocks of almost unimaginable power and complexity. The first part explores how centuries of scientific and religious dogma were overturned by the earliest discoveries of the existence of cells‚ and how scientists came to realize that there was‚ literally‚ more to life than meets
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The structure and function of carbohydrates A carbohydrate is an organic molecule containing only Carbon‚ Hydrogen and Oxygen with the general formula Cn(H20)n. They are made up of individual molecules called monomers which are joined together by condensation reactions to make a longer chain called a polymer. Carbohydrates are categorised in to three main groups; monosaccharides‚ disaccharides and polysaccharides. Monosaccharides are single sugars and are sweet tasting soluble substances such
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AMINO ACIDS SUSMITA DAS SWAPNA MONDAL OBJECTIVES To study about Amino acids. To study the classifications of amino acids based on different headings. To study the functions of amino acids. INTRODUCTION Amino acids:• Amino acids are monomers of protein. • Amino acids are group of organic compounds which contain two functional groups. One is Amino group(NH2) and the other is Carboxyl group(COOH). • Proteins are broken down into amino acids on hydrolysis. • Each amino acid also have a
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